Don't worry about keeping it outside! Some guys wax and polish their tractors, keep them all shiney, but some of us buy them to work. Maybe someday I'll have finished using it on all the projects I bought it for, and I'll have time and money to put up a shelter for it, but that will be a long time I'm sure. By then it will have faded paint, the decals will have come off, and maybe a rust spot or two (although I'm amazed at how well Kioti's paint & finish is holding up) - but it will run great and work as well as ever. Keep it greased and lubricated, change the fluids and filters, don't abuse it. Hose it off now and then. If you bend something, bang it back with a hammer. It's a tractor.
The only part I'm worried about keeping covered is the plastic dash panel & instruments - but for a handle or two, the rest is metal (pretty thick too - one of the things that attracted me to it).
Do you remember the "Velvetine Rabbit"? It's kinda like that, only there ain't no tractor magic fairy! Life's hard when you're a tractor, that's just the way it is!